01 - In a mixing bowl, beat together powdered sugar, unsalted butter, peppermint extract, heavy cream, and salt until a smooth, pliable dough forms. If the mixture is too sticky, gradually add more powdered sugar until it is workable.
02 - Scoop out portions of dough, about 2 teaspoons each, and flatten into 1/4-inch thick discs. Arrange discs on a parchment-lined baking sheet.
03 - Place the baking sheet in the freezer for 20 to 30 minutes until the discs are firm.
04 - In a heatproof bowl set over a pot of simmering water, melt dark chocolate with coconut oil (if using), stirring until completely smooth.
05 - Dip each chilled peppermint disc into the melted chocolate using a fork, allowing excess chocolate to drip back into the bowl. Return coated discs to the parchment-lined baking sheet.
06 - Chill the patties in the refrigerator for at least 15 minutes or until the chocolate coating is firm.